docs: def relocate_audio_to_wav_files(self, target_path):
          """
          Copies every track to its own wav file in the given folder.
          Every track will be stored at ``target_path/track_id.wav``.
          """
  
          if not os.path.isdir(target_path):
              os.makedirs(target_path)
  
          new_tracks = {}
  
          # First create a new container track for all existing tracks
          for track in self.tracks.values():
              track_path = os.path.join(target_path, '{}.wav'.format(track.idx))
              sr = track.sampling_rate
              samples = track.read_samples()
  
              audio.write_wav(track_path, samples, sr=sr)
              new_track = tracks.FileTrack(track.idx, track_path)
  
              new_tracks[track.idx] = new_track
  
          # Update track list of corpus
          self._tracks = new_tracks
  
          # Update utterances to point to new tracks
          for utterance in self.utterances.values():
              new_track = self.tracks[utterance.track.idx]
              utterance.track = new_track